2.Beg and request are used in certain conventional formulas, in the sense of ask.Beg, once a part of many formal expressions used in letter writing, debate, etc., is now used chiefly in such courteous formulas as I beg your pardon; The Committee begs to report, etc. Request, more impersonal and now more formal, is used in giving courteous orders (You are requested to report) and in commercial formulas like to request payment.

beg

v.

c.1200, perhaps from Old English bedecian "to beg," from Proto-Germanic *beth-; or possibly from Anglo-French begger, from Old French begart (see beggar). The Old English word for "beg" was wædlian, from wædl "poverty." Of trained dogs, 1816.

As a courteous mode of asking (beg pardon, etc.), first attested c.1600. To beg the question translates Latin petitio principii, and means "to assume something that hasn't been proven as a basis of one's argument," thus "asking" one's opponent to give something unearned, though more of the nature of taking it for granted without warrant.